Directions:
- Combine cornstarch and soy sauce; stir in chicken. Let stand 15 minutes.
- Heat oil in hot wok or large skillet over medium-high heat. Add chicken and stir-fry 2 minutes.
- Add onion; stir-fry 1 minute. Add bell peppers; stir-fry 2 minutes longer, or until chicken is cooked.
- Reduce heat to low; pour in kung pao sauce. Cook and stir until sauce is heated through.
- Transfer to serving plate and sprinkle peanuts on top, if desired.